<template>
  <div>
    <el-form ref="loginForm" :model="form" :rules="rules" label-width="70px" class="login-box">
      <h2 class="login-title">欢迎登录</h2>
      <el-form-item label="账号" prop="username">
        <el-input type="text" placeholder="请输入账号" v-model="form.username" />
      </el-form-item>
      <el-form-item label="密码" prop="password">
        <el-input type="password" placeholder="请输入密码" v-model="form.password" />
      </el-form-item>
      <el-form-item style="height: 40px">
        <el-checkbox class="login-rem" v-model="check">记住密码</el-checkbox>
        <el-link class="login-reset" @click="jump()" :underline="false">忘记密码</el-link>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" v-on:click="onSubmit('loginForm')">登录</el-button>
      </el-form-item>
    </el-form>

    <el-dialog title="温馨提示" :visible.sync="dialogVisible" width="30%" :before-close="handleClose">
      <span>请输入账号和密码</span>
      <span slot="footer" class="dialog-footer">
        <el-button type="primary" @click="dialogVisible = false">确定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: "login",
  data() {
    //   自定义校验规则
    var checkUsername = (login, value, callback) => {
      if (!value)
        return callback(new Error('用户名不能为空 '));
      //   自定义校验规则

      callback();
    };
    var checkPassword = (login, value, callback) => {
      if (!value)
        return callback(new Error('密码不能为空 '));
      // if (value.length < 6) {
      //   return callback(new Error('密码不能小于6位 '));
      // }
      callback();
    };
    return {
      form: {
        username: '',
        password: ''
      },
      //表单验证，需要在 el-form-item 元素中增加prop属性
      rules: {
        username: [
          //   validator: 验证
          //   trigger： 触发
          //   required: 必填项
          { validator: checkUsername, trigger: "blur", required: true }
        ],
        password: [
          { validator: checkPassword, trigger: "blur", required: true }
        ]
      },
      check: true,

      //对话框显示和隐藏
      dialogVisible: false
    }
  },
  methods: {
    onSubmit(formName) {
      //为表单绑定验证功能
      this.$refs[formName].validate((valid) => {
        if (valid) {
          //使用vue-router路由到指定界面，该方式称为编程式导航
          this.$router.push('/home');
          // + this.form.username
        } else {
          this.dialogVisible = true;
          return false;
        }
      });
    },
    handleClose(done) {
      /*this.$confirm('确认关闭？')
        .then(_ => {
          done();
        })
        .catch(_ => {});*/
    },
    jump() {
      this.$router.push({ path: '/forget' })
    }
  }
}
</script>

<style scoped>
.login-box {
  border: 1px solid #DCDFE6;
  width: 350px;
  margin: 180px auto;
  padding: 35px 35px 15px 35px;
  border-radius: 5px;
  -webkit-border-radius: 5px;
  -moz-border-radius: 5px;
  box-shadow: 0 0 25px #909399;
}

.login-title {
  text-align: center;
  margin: 0 auto 40px auto;
  color: #303133;
}

.login-rem {
  margin: 0px 0px 35px 0px;
  text-align: left;
  float: left;
}

.login-reset {
  float: right;
  font-size: 14px;
  
}

</style>